XRT7300IV View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7300IV' PDF : 55 Pages View PDF
XRT7300
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.1.1
áç
Figure 35 illustrates how to interface the XRT7300 to
the XRT7250 E3/DS3 Framer IC. Please note that in
this case, the XRT7300 has been configured to oper-
ate in the Hardware Mode.
For more information on the XRT7250 E3/DS3 Fram-
er IC’s please consult the XRT7250 E3/DS3 Framer
IC Data Sheet.
FIGURE 35. HOW TO INTERFACE THE XRT7300 IC TO THE XRT7250 DS3/E3 FRAMER IC
TxSER
TXInClk
TxFrame
NIBBLEINTF
RESET
INT
CS
RW
DS
AS
INT
A[8:0]
D[7:0]
5V
RxSer
RxClk
RxFrame
RxLOS
RxOOF
RxRED
RxAIS
XRT7250
TxSER
TXInClk
TxFrame
TxPOS
NIBBLEINTF
TxNEG
RESET
TxLineClk
INT
CS
WR_RW
RD_DS
ALE_AS
Rdy Dtck
DMO
ExtLOS
RLOL
A0
A1
LLOOP
A2
A3
RLOOP
A4
A5
TAOS
A6
A7
TxLEV
A8
ENCODIS
D0
D1
D2
REQB
D3
D4
D5
D6
D7
MOTO
RxSer
RxClk
RxFrame
RxPOS
RxNEG
RxLineClk
RxLOS
RxOOF
RxRED
RxAIS
XRT7300
TPDATA
TNDATA
TCLK
TTIP
DMO
RLOS
RLOL
TRING
MTIP
R3
270 Ω
LLB
RLB
TAOS
TXLEV
ENCODIS
MRING
R4
270 Ω
REQDIS
R1
36Ω
T1
TTIP
TRING
1:1
R2
36Ω
RPOS
RNEG
RCLK1
RTIP
R5
37.5 Ω
RRING
C1
0.01uF
R6
37.5 Ω
T2
RTIP
RRING
1:1
48
Share Link: 
